The social giant on Monday announced plans to lay nearly 500 miles of fiber cable in Uganda by the end of the year, infrastructure that Facebook believes will provide internet access for more than 3 million people. Facebook is not, however, providing its own wireless network. The company is partnering with Airtel and BCS to provide the actual internet service, and says the fiber will offer more support for “mobile operators’ base stations.” The company also says that it’s “open” to working with other network providers down the line.